Watchout (longbow skill 2) should be a skill available for heroes stood in watchtowers

[swift flower]

and longbow should gain some other more useful skill
Watchtowers could also give a skill that allows some enemies to be targeted by other heroes regardless of line of sight

[proven gyro]

Proposal for replacement: Replace with Entrench: self buff, 2 use 0 ap 0 mana 2 movement cost that grants 10/11/12/13/14/15% ranged damage and 1 skill range for 2 turns